One function of Quix that made me instantly want it in Opera custom search is ability to use current URL as parameter. This can greatly simplify some searches, which I often do and find very annoying to type out every time.
Custom search limitation
Search engines in Opera can only process single parameter in query – whatever you type, even if that is multiply words. It is represented in engine settings as %s. Whatever you input after engine shortcut will replace %s in resulting URL (even if there are several %s used).
So natively there is no way to use such things as current site as search parameter. At best you can edit URL or copy/paste what is needed.
Use current URL
After few test I got this line to use as search engine (should be use in single line):
This will run Google search with your query as usual, but also append filter that limits results to site you are currently on.
Use selection from page
However I hit another roadblock here – you can’t run custom search with selection alone. You need to type something in as query or it won’t be recognized as search attempt.
I will brood on this some more, but for now I used this code for some simple bookmarklets. For example I often check URLs in comments for moderation with BackType. So bookmarklet to run such check on selection will be:
What would you like to use as search in Opera, but currently can’t? Share your ideas in the comments.